i implemented Ascon-Hash256 in Amaranth! (as well as laid the groundwork for the rest of Ascon family functions, including Ascon-AEAD128)

it comes at 1268 LUTs for iCE40 in the "compact" configuration, processing an average of 5.3 bit/cycle. a little expensive, but modern and cheaper than many better known alternatives

screenshot of test vectors output by a python process in terminal
0

If you have a fediverse account, you can quote this note from your own instance. Search https://mastodon.social/users/whitequark/statuses/115792328736298685 on your instance and quote it. (Note that quoting is not supported in Mastodon.)